Re: [fluka-discuss]: fluka simulation

From: Alberto Fasso' <>
Date: Wed, 22 Jul 2015 00:57:38 -0700 (PDT)

On Sun, 19 Jul 2015, teterev wrote:

> Hello!Thank you for your previous help!!!!!!!
> I think that I corrected all error. Yield of helium-6 = 1.2 x 10 7 and yield
> of protons = 4.02 × 10 8 to 1 mA. Therefore, I have following questions:
> 1) We expect that yield of helium-6 will be more, because we are now
> experimentally obtain about 4.5 x 10 7 helium-6 for 1 mA. Also, I'm
> interested in the fact that yield of protons and helium-6 so very different.
> Why is this so? I really asking you to look again at the code,please.

I would like to stress that numbers such as those you are reporting are
MEANINGLESS if they are not expressed together with a statistical error.
I don 't know if an answer to your question exists, but without errors,
all discussion is impossible.

> 2) Can I use the following command for the calculation of the 7Li (g,p)6He
> cross section ?:
> USRBIN 12. PROTON -41. TARGET protons

No, you cannot. The first line seems to request a proton fluence in region
TARGET (actually a proton total tracklength). But the second line needs a &
in the SDUM field in order to be considered a continuation card.

Read the Manual, command USRBIN:
     WHAT(2) : particle (or particle family) type to be scored
               follows a list of generalised particles, which does not apply here
               Any other particle (or family of particles) requested will score:
                a) if WHAT(1) < 10, ............ [not relevant here]
                b) if WHAT(1) >= 10, fluence of particles (or family of
                   particles) with particle code (or name) = WHAT(2).

You cannot use USRBIN to score a particular residual nucleus.


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Received on Wed Jul 22 2015 - 11:30:14 CEST

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